Some quick mental arithmetic work here, ideal for homework. Multiplying 0.6 by 7 is not really any harder than multiplying 6 by 7, as long as you have a good understanding of place value.
Watch out for a common error with these, an example of which is:
0.8 x 7 = 0.56
In this case, whilst the times table is known what to do about the decimal point remains a mystery. if you come across this error it would be a very good idea to go back to basics and look at multiplying and dividing by 10 across the decimal point.
This is a good page for year 6 revision but could be used by younger children who have a sound understanding of decimals. It can be found in our year 6 Knowing number facts section.